AB378A Fibre Channel Mass Storage Adapter Installation Guide, December 2005

Fibre Channel Adapter Installation
Interpreting Hardware Paths
Chapter 1
14
Figure 1-2 Example of a Hardware Path for a Direct Fabric Attach Device
Figure 1-3 Example of a Hardware Path for a Private Loop Device
Each field in the hardware path is described below:
Table 1-4
Field Value Information
Fibre Channel Topology of HBA
Direct Fabric Attach Private Loop
Adapter This is the hardware path of the Fibre Channel adapter through which the LUN is seen.
In the case of multi-port adapters, this field describes a specific port on the adapter.
Domain The value depends
on the Fibre
Channel topology of
the HBA.
This field is typically the Domain ID
of the switch to which the target
device is attached. The value of
this field is taken from the most
significant byte of the N_Port ID of
the target device.
This field is set to 8.
For historical reasons, HP-UX
uses a Domain ID of 8 to indicate
Private Loops. Fibre Channel
switches seen by HP-UX hosts
cannot be configured with
Domain ID of 8; doing so is
unsupported and will not work.
Area The value depends
on the Fibre
Channel topology of
the HBA.
This field is taken from the second
byte of the N_Port ID of the target
device.
On some switches, the second byte of
the N_Port ID encodes the switch
port to which the device is
connected. How this encoding is
done depends on the switch. Consult
the relevant switch manual to
interpret this field.
This field is set to 0.
Adapter Area Port Bus Target LUNDomain
0/1/2/0.1.19.255.0.0.0
Adapter Area Port Bus Target LUNDomain
0/1/2/0.8.0.255.0.1.0